Board Thread:General Discussion/@comment-34242403-20180112014206/@comment-27876799-20180112021925

Soft resetting does not work as the shininess of the Pokemon in the egg is predetermined. By the way, Ro-Powers should be used when you are collecting the eggs from the Day Care man, not hatching them, as this is when the shininess is determined. If you plan to use a certain Pokemon for competitive, then IVs and natures are pretty important. So if a shiny Pokemon has poor IVs, then it might not be worth it to train it up.